They spent several hours outside the International Space Station, conducted simulated repairs while perched at the extendedend of a robotic arm.
他们在国际空间站外花了几个小时,在处于机器人手臂末段模拟维修。
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Research on extendedend-plate connection with end-plate stiffer under cyclic load by test, discuss the effect of stiffer on the capability of the connection.